Controlfreak - love the name!
I was exactly the same. I'm not kidding, it wasn't til DD was 9 months old that i could actually sleep through the night without waking and and checking her. There were at least three or four times in the first couple of months where i actually grabbed her out of the bassinette and woke her cause i couldnt feel or hear her breathing.
For some reason I felt like everything was too perfect and that something would go wrong.
DD is about to turn 8 next month, and is a health little chicken. So I know how you felt, i was shocking with it, but no premenition or indication of something to go wrong, just the usualy mother child bond as strong as ever, worrying about your little one! It will get easier, and you'll become more relaxed, only to move on to the next stage and age and worry about something else!!

Take care